Unit I DIODE CIRCUITS
Rectifiers: Definition – Operation of Half Wave, Full Wave, and Bridge
Rectifiers
Clippers and Clampers: Construction & Working Principle of Positive,
Negative, and Biased Clippers – Construction & Working Principle of
Positive and Negative Clampers
Opto-Electronic Devices: Definition -Symbol, Working principle,
Characteristics and Applications of LED and Photo-Diode

Unit II BIPOLAR JUNCTION TRANSISTOR
Working Principle: Construction and Working principles of NPN and
PNP transistors – modes of BJT (Active, Saturation and Cut Off)
Configurations: CE, CB, and CC and their I/O characteristics.
Transistor Biasing: Need for Biasing- Stability Factor – Types of
Biasing – Fixed Bias – Collector to Base Bias -Voltage Divider Bias

Unit III AMPLIFIERS
Single Stage Amplifiers: Transistor as an Amplifier and as a switchWorking Principle of Common Emitter Amplifier- Working Principle and
Frequency Response characteristics of RC Coupled Amplifier
Power Amplifiers: Construction, Working Principle, Operation and
Characteristics of Class A, Class B, Class C, and Class B push pull
Amplifier
Multistage Amplifiers: Cascade, Cascode and Darlington pair
Configuration (Basic concepts only) – Differential Amplifier:
Construction and operation – CMRR (definition only).

Unit IV FEEDBACK AMPLIFIERS AND OSCILLATORS
Feedback Amplifiers: Concept –Types of feedback – Positive feedback
and Negative feedback- Types of negative feedback amplifiers- Effects
of Negative feedback
Theory of Oscillation: Tank Circuit-Conditions for Oscillation
(Barkhausen Criterion) – Classifications
Oscillator Circuits: Construction, Working Principle and Operation of
Hartley Oscillator, Colpitts Oscillator, Wien bridge Oscillator, RC Phase
Shift Oscillator and Crystal Oscillator

Unit V FIELD EFFECT TRANSISTORS & UNI JUNCTION
TRANSISTOR
FET: Definition and Types – Comparison between FET and BJTConstruction and Working principle of N Channel JFET- Drain and
Transfer Characteristics of JFET.
MOSFET (N Channel Enhancement and Depletion Mode):
Construction, Working Principle, Operation and Characteristics.
UJT: Construction-Equivalent circuit -Operation-Characteristics- UJT as
a Relaxation Oscillator.